DoraemonKit - View Border打开此功能会给APP所有的UI画边框
设计原理:通过runtime重写layoutSubviews方法(UI渲染和刷新UI),然后在重写方法里获取到UI对象,根据其frame,创建带边框线的layer,并添加到UI对象上,就实现了该功能了,具体实现代码如下
//
// UIView+DoraemonViewMetrics.m
// DoraemonKit
//
// Created by xgb on 2018/12/11.
//
#import "UIView+DoraemonViewMetrics.h"
#import "DoraemonViewMetricsConfig.h"
#import "NSObject+Doraemon.h"
#import <objc/runtime.h>
#import "DoraemonDefine.h"
@interface UIView ()
@property (nonatomic ,strong) CALayer *metricsBorderLayer;
@end
@implementation UIView (DoraemonViewMetrics)
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[[self class] doraemon_swizzleInstanceMethodWithOriginSel:@selector(layoutSubviews) swizzledSel:@selector(doraemon_layoutSubviews)];
});
}
- (void)doraemon_layoutSubviews
{
[self doraemon_layoutSubviews];
if (DoraemonViewMetricsConfig.defaultConfig.opened) {
[self doraemonMetricsRecursiveEnable:DoraemonViewMetricsConfig.defaultConfig.enable];
}
}
- (void)doraemonMetricsRecursiveEnable:(BOOL)enable
{
// 状态栏不显示元素边框
UIWindow *statusBarWindow = [[UIApplication sharedApplication] valueForKey:@"_statusBarWindow"];
if (statusBarWindow && [self isDescendantOfView:statusBarWindow]) {
return;
}
for (UIView *subView in self.subviews) {
[subView doraemonMetricsRecursiveEnable:enable];
}
if (enable) {
if (!self.metricsBorderLayer) {
UIColor *borderColor = DoraemonViewMetricsConfig.defaultConfig.borderColor ? DoraemonViewMetricsConfig.defaultConfig.borderColor : UIColor.doraemon_randomColor;
self.metricsBorderLayer = ({
CALayer *layer = CALayer.new;
layer.borderWidth = DoraemonViewMetricsConfig.defaultConfig.borderWidth;
layer.borderColor = borderColor.CGColor;
layer;
});
[self.layer addSublayer:self.metricsBorderLayer];
}
self.metricsBorderLayer.frame = CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height);
self.metricsBorderLayer.hidden = NO;
} else if (self.metricsBorderLayer) {
self.metricsBorderLayer.hidden = YES;
}
}
- (void)setMetricsBorderLayer:(CALayer *)metricsBorderLayer
{
objc_setAssociatedObject(self, @selector(metricsBorderLayer), metricsBorderLayer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CALayer *)metricsBorderLayer
{
return objc_getAssociatedObject(self, _cmd);
}
@end
-
效果图
Simulator Screen Shot - iPhone 11 - 2020-06-19 at 17.49.52.png
网友评论